GCN Circulars
GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.
Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search
To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"11 results found.
- GRB 060929: Further XRT Refined Analysis
- GRB 060929: Swift/UVOT Optical Observations
- GRB060929: Swift-XRT refined analysis.
- GRB 060929, Swift-BAT further refined analysis - late-time flare
- GRB 060929: TNG K-band observations
- GRB 060929, Swift-BAT refined analysis
- GRB 060929: BART observation
- GRB 060929: MASTER-VWF-Kislovodsk observations
- GRB 060929: BOOTES-IR & OSN observations
- Liverpool Telescope observations of GRB 060929
- GRB 060929: Swift detection of a burst